| Marigold Alliance LP | | 2015 |
| Marigold Group LP | | 2015 |
| Marigold Solutions LP | | 2015 |
| Marina Cafe Limited | Hospitality | 2005 |
| Marina Partnership SP | | 2002 |
| Marinabay LP | | 2014 |
| Marinada LP | | 2001 |
| Marinamuse Ltd | Information & communication | 2025 |
| Marinas in Video Limited | Other services | 2025 |
| Marinbay Limited | Transport & logistics | 2002 |
| Marine Agency Kherson LP | | 2017 |
| Marine Corporation L.P. | | 2010 |
| Marine Elite LP | | 2015 |
| Marine Organisation L.P. | | 2009 |
| Marine Service LP | | 2014 |
| Marine Services Group LP | | 2014 |
| Marine Uniform Services Holdings LP | | 2018 |
| Marine Uniform Services LP | | 2018 |
| Marine World L.P. | | 2012 |
| Marinesko MLC LP | | 2017 |
| Marinetech L.P. | | 2011 |
| Maringo Corporation L.P. | | 2012 |
| Marino Associates LP | | 2016 |
| Marino Foods Limited | Hospitality | 1998 |
| Mario House LET Ltd | Real estate | 2025 |
| Mario Patisserie Ltd | Wholesale & retail | 2026 |
| Mariogas Limited | Real estate | 2025 |
| Marion Alliance LP | | 2019 |
| Marionville Masonry Ltd | Construction | 2017 |
| Marios Take Away Limited | Administrative & support | 2017 |
| Maris Corporate LP | | 2019 |
| Marisol Holding LP | | 2017 |
| Marisolda Ltd | Wholesale & retail | 2025 |
| Marisundra Ltd | Wholesale & retail | 2026 |
| Maritaluxgiveaway Ltd | Professional & scientific | 2026 |
| Marite Shipping LP | | 2015 |
| Maritim Alliance LP | | 2016 |
| Maritime Alliance LP | | 2015 |
| Maritime Offshore Service Ltd | Manufacturing | 2025 |
| Maritime Risk and Safety Consultants Limited | Administrative & support | 2010 |
| Maritime Street Ltd | Construction | 2021 |
| Maritime Transport & Agencies L.P. | | 2016 |
| Marius Marketing LP | | 2013 |
| Marix LP | | 2017 |
| Marjo Capital LP | | 2016 |
| Mark Brock Building Company Ltd. | Construction | 2008 |
| Mark Burns Consultancy Ltd | Professional & scientific | 2024 |
| Mark European Retail Partners I Scottish Limited Partnership | | 2007 |
| Mark European Retail Partners II Scottish Limited Partnership | | 2011 |
| Mark European Retail Partners III Scottish Limited Partnership | | 2015 |
| Mark Fisher Limited | Information & communication | 2005 |
| Mark GP (Scotland) Limited | Real estate | 2007 |
| Mark Hill Farms Limited | Agriculture & fishing | 1976 |
| Mark Ireland Projects Ltd | Real estate | 2023 |
| Mark Mccraw Limited | Professional & scientific | 2018 |
| Mark Medcalf Limited | Other services | 2014 |
| Mark Miller Landscapes Limited | Administrative & support | 2017 |
| Mark Miller Properties Limited | Hospitality | 2015 |
| Mark Murphy & Partner Limited | Wholesale & retail | 1998 |
| Mark Peaty Building Services Limited | Construction | 2019 |
| Mark Penman Consulting Limited | Administrative & support | 2010 |
| Mark Porteous Funeral Directors Ltd | Other services | 2005 |
| Mark Potter Associates Limited | Health & social care | 2013 |
| Mark Rowson Ltd | Extraterritorial | 2012 |
| Mark Sherwin BSL Interpreting Limited | Professional & scientific | 2026 |
| Mark Smith Glazing Limited | Manufacturing | 2023 |
| Mark Tomassi Taxis Limited | Transport & logistics | 2008 |
| Mark Zhang Limited | Health & social care | 2022 |
| Markaleo Ltd | Wholesale & retail | 2025 |
| Markdavidsalon Ltd | Other services | 2019 |
| Markelo Consult LP | | 2016 |
| Markem Production Ltd | Information & communication | 2021 |
| Markenna Property Ltd | Real estate | 2020 |
| Market and Regulatory Consultants Limited | Professional & scientific | 2015 |
| Market Bay LP | | 2017 |
| Market Close Limited | Hospitality | 2026 |
| Market Giant LP | | 2015 |
| Market in LP | | 2015 |
| Market Inter LP | | 2015 |
| Market Investments Worldwide L.P. | | 2012 |
| Market LED Ltd. | Administrative & support | 2009 |
| Market Leisure Ltd | Extraterritorial | 2016 |
| Market Professional LP | | 2015 |
| Market Street Limited | Hospitality | 2013 |
| Market Town Software Limited | Professional & scientific | 2025 |
| Marketa Holding LP | | 2015 |
| Marketd Limited | Professional & scientific | 2022 |
| Marketex Trade LP | | 2016 |
| Marketgate Developments (Ormiston) Limited | Administrative & support | 1974 |
| Marketim LP | | 2011 |
| Marketing Advisors LP | | 2015 |
| Marketing Co.(Scot.) Ltd | Households | 2019 |
| Marketing Concepts Limited | Professional & scientific | 2002 |
| Marketing Enterprises LP | | 2015 |
| Marketing Kick LP | | 2016 |
| Marketing Links Scotland Limited | Administrative & support | 1991 |
| Marketing Photography Limited | Professional & scientific | 2013 |
| Marketing Quest LP | | 2016 |
| Marketing Yeta LP | | 2016 |
| Marketmagnet Ltd | Wholesale & retail | 2024 |